▎ 摘　　要

NOVELTY - Highly flexible graphene film preparation involves applying 6-20 mg/ml solution of graphene oxide film on mold plate, placing in refrigerator for crystallization, and then drying naturally to give oxidized graphene film. The oxidized graphene film is reduced in hydroiodic acid solution. The graphene film is immersed in ethanol to wash out surface hydroiodic acid, and then naturally dried to obtain the highly flexible graphene film. USE - Method for preparing highly flexible graphene film (claimed) used as high elastic flexible conductive devices. ADVANTAGE - The method prepares the highly flexible graphene film in a simple and cost-effective manner with excellent flexibility, repeated bending more than 100000 times, elastic elongation at break of 20-50%, and electrical conductivity of 600-1000 seconds/cm. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic surface view of the highly flexible graphene film.